What is Essential Oil? - QS Study
QS Study

Essential oil: Collecting the extract of roots, leaf, flower seeds from plant and important oils prepared from these extract. This oil is called essential oil e.g. Amla, Olive etc.

Essential oils, like all organic compounds, are made up of hydrocarbon molecules and can further be classified as terpenes, alcohols, esters, aldehydes, ketones and phenols etc.